Refactor: add gpu_create_texture_view_2d helper

Reduces WGPUTextureViewDescriptor boilerplate from 5-7 lines to 1-2.
Helper supports optional mip_levels parameter (defaults to 1).

Updated 17 call sites across gpu/, tests/, and tools/.
Net: -82 lines. All tests passing (34/34).

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

9 files changed, 50 insertions, 132 deletions

diff --git a/src/gpu/effect.cc b/src/gpu/effect.cc
index 3ee2acd..52128c4 100644
--- a/src/gpu/effect.cc
+++ b/src/gpu/effect.cc
@@ -127,14 +127,10 @@ void MainSequence::create_framebuffers(int width, int height) {
   framebuffer_a_ = wgpuDeviceCreateTexture(gpu_ctx.device, &desc);
   framebuffer_b_ = wgpuDeviceCreateTexture(gpu_ctx.device, &desc);
 
-  WGPUTextureViewDescriptor view_desc = {};
-  view_desc.dimension = WGPUTextureViewDimension_2D;
-  view_desc.format = gpu_ctx.format;
-  view_desc.mipLevelCount = 1;
-  view_desc.arrayLayerCount = 1;
-
-  framebuffer_view_a_ = wgpuTextureCreateView(framebuffer_a_, &view_desc);
-  framebuffer_view_b_ = wgpuTextureCreateView(framebuffer_b_, &view_desc);
+  framebuffer_view_a_ =
+      gpu_create_texture_view_2d(framebuffer_a_, gpu_ctx.format);
+  framebuffer_view_b_ =
+      gpu_create_texture_view_2d(framebuffer_b_, gpu_ctx.format);
 
   // Depth Buffer
   WGPUTextureDescriptor depth_desc = {};
@@ -478,14 +474,7 @@ void MainSequence::register_auxiliary_texture(const char* name, int width,
   FATAL_CHECK(!texture, "Failed to create auxiliary texture: %s\n", name);
 
   // Create view
-  const WGPUTextureViewDescriptor view_desc = {
-      .format = gpu_ctx.format,
-      .dimension = WGPUTextureViewDimension_2D,
-      .mipLevelCount = 1,
-      .arrayLayerCount = 1,
-  };
-
-  WGPUTextureView view = wgpuTextureCreateView(texture, &view_desc);
+  WGPUTextureView view = gpu_create_texture_view_2d(texture, gpu_ctx.format);
   FATAL_CHECK(!view, "Failed to create auxiliary texture view: %s\n", name);
 
   // Store in registry
@@ -535,14 +524,7 @@ void MainSequence::resize_auxiliary_texture(const char* name, int width,
   FATAL_CHECK(!texture, "Failed to resize auxiliary texture: %s\n", name);
 
   // Create view
-  const WGPUTextureViewDescriptor view_desc = {
-      .format = gpu_ctx.format,
-      .dimension = WGPUTextureViewDimension_2D,
-      .mipLevelCount = 1,
-      .arrayLayerCount = 1,
-  };
-
-  WGPUTextureView view = wgpuTextureCreateView(texture, &view_desc);
+  WGPUTextureView view = gpu_create_texture_view_2d(texture, gpu_ctx.format);
   FATAL_CHECK(!view, "Failed to create resized auxiliary texture view: %s\n",
               name);
 
diff --git a/src/gpu/gpu.cc b/src/gpu/gpu.cc
index cf5d85d..535de67 100644
--- a/src/gpu/gpu.cc
+++ b/src/gpu/gpu.cc
@@ -98,6 +98,20 @@ WGPUTextureView gpu_create_mip_view(WGPUTexture texture,
   return wgpuTextureCreateView(texture, &view_desc);
 }
 
+WGPUTextureView gpu_create_texture_view_2d(WGPUTexture texture,
+                                           WGPUTextureFormat format,
+                                           uint32_t mip_levels) {
+  const WGPUTextureViewDescriptor view_desc = {
+      .format = format,
+      .dimension = WGPUTextureViewDimension_2D,
+      .baseMipLevel = 0,
+      .mipLevelCount = mip_levels,
+      .baseArrayLayer = 0,
+      .arrayLayerCount = 1,
+  };
+  return wgpuTextureCreateView(texture, &view_desc);
+}
+
 RenderPass gpu_create_render_pass(WGPUDevice device, WGPUTextureFormat format,
                                   const char* shader_code,
                                   ResourceBinding* bindings, int num_bindings) {
diff --git a/src/gpu/gpu.h b/src/gpu/gpu.h
index b52d6ab..74e0eb7 100644
--- a/src/gpu/gpu.h
+++ b/src/gpu/gpu.h
@@ -99,6 +99,9 @@ TextureWithView gpu_create_storage_texture_2d(WGPUDevice device, uint32_t width,
                                               WGPUTextureFormat format);
 WGPUTextureView gpu_create_mip_view(WGPUTexture texture,
                                     WGPUTextureFormat format, uint32_t mip_level);
+WGPUTextureView gpu_create_texture_view_2d(WGPUTexture texture,
+                                           WGPUTextureFormat format,
+                                           uint32_t mip_levels = 1);
 ComputePass gpu_create_compute_pass(WGPUDevice device, const char* shader_code,
                                     ResourceBinding* bindings,
                                     int num_bindings);
diff --git a/src/gpu/texture_manager.cc b/src/gpu/texture_manager.cc
index dfa6315..d5821ee 100644
--- a/src/gpu/texture_manager.cc
+++ b/src/gpu/texture_manager.cc
@@ -103,16 +103,8 @@ void TextureManager::create_texture(const std::string& name, int width,
                         &source_layout, &tex_size);
 
   // 4. Create View
-  WGPUTextureViewDescriptor view_desc = {};
-  view_desc.format = WGPUTextureFormat_RGBA8Unorm;
-  view_desc.dimension = WGPUTextureViewDimension_2D;
-  view_desc.baseMipLevel = 0;
-  view_desc.mipLevelCount = 1;
-  view_desc.baseArrayLayer = 0;
-  view_desc.arrayLayerCount = 1;
-  view_desc.aspect = WGPUTextureAspect_All;
-
-  WGPUTextureView view = wgpuTextureCreateView(texture, &view_desc);
+  WGPUTextureView view =
+      gpu_create_texture_view_2d(texture, WGPUTextureFormat_RGBA8Unorm);
 
   // 5. Store
   GpuTexture gpu_tex;
@@ -242,12 +234,8 @@ void TextureManager::dispatch_compute(const std::string& func_name,
   wgpuBufferUnmap(uniform_buf);
 
   // Create storage texture view
-  WGPUTextureViewDescriptor view_desc = {};
-  view_desc.format = WGPUTextureFormat_RGBA8Unorm;
-  view_desc.dimension = WGPUTextureViewDimension_2D;
-  view_desc.mipLevelCount = 1;
-  view_desc.arrayLayerCount = 1;
-  WGPUTextureView target_view = wgpuTextureCreateView(target, &view_desc);
+  WGPUTextureView target_view =
+      gpu_create_texture_view_2d(target, WGPUTextureFormat_RGBA8Unorm);
 
   // Create bind group layout entries (must match pipeline)
   WGPUBindGroupLayoutEntry bgl_entries[2] = {};
@@ -332,12 +320,8 @@ void TextureManager::create_gpu_noise_texture(
                           params.params[0], params.params[1]};
   dispatch_compute("gen_noise", texture, params, &uniforms, sizeof(NoiseParams));
 
-  WGPUTextureViewDescriptor view_desc = {};
-  view_desc.format = WGPUTextureFormat_RGBA8Unorm;
-  view_desc.dimension = WGPUTextureViewDimension_2D;
-  view_desc.mipLevelCount = 1;
-  view_desc.arrayLayerCount = 1;
-  WGPUTextureView view = wgpuTextureCreateView(texture, &view_desc);
+  WGPUTextureView view =
+      gpu_create_texture_view_2d(texture, WGPUTextureFormat_RGBA8Unorm);
 
   GpuTexture gpu_tex;
   gpu_tex.texture = texture;
@@ -389,12 +373,8 @@ void TextureManager::create_gpu_perlin_texture(
   dispatch_compute("gen_perlin", texture, params, &uniforms,
                    sizeof(PerlinParams));
 
-  WGPUTextureViewDescriptor view_desc = {};
-  view_desc.format = WGPUTextureFormat_RGBA8Unorm;
-  view_desc.dimension = WGPUTextureViewDimension_2D;
-  view_desc.mipLevelCount = 1;
-  view_desc.arrayLayerCount = 1;
-  WGPUTextureView view = wgpuTextureCreateView(texture, &view_desc);
+  WGPUTextureView view =
+      gpu_create_texture_view_2d(texture, WGPUTextureFormat_RGBA8Unorm);
 
   GpuTexture gpu_tex;
   gpu_tex.texture = texture;
@@ -436,12 +416,8 @@ void TextureManager::create_gpu_grid_texture(
       params.num_params > 1 ? (uint32_t)params.params[1] : 2u};
   dispatch_compute("gen_grid", texture, params, &uniforms, sizeof(GridParams));
 
-  WGPUTextureViewDescriptor view_desc = {};
-  view_desc.format = WGPUTextureFormat_RGBA8Unorm;
-  view_desc.dimension = WGPUTextureViewDimension_2D;
-  view_desc.mipLevelCount = 1;
-  view_desc.arrayLayerCount = 1;
-  WGPUTextureView view = wgpuTextureCreateView(texture, &view_desc);
+  WGPUTextureView view =
+      gpu_create_texture_view_2d(texture, WGPUTextureFormat_RGBA8Unorm);
 
   GpuTexture gpu_tex;
   gpu_tex.texture = texture;
@@ -528,12 +504,8 @@ void TextureManager::dispatch_composite(
   wgpuBufferUnmap(uniform_buf);
 
   // Create storage texture view
-  WGPUTextureViewDescriptor view_desc = {};
-  view_desc.format = WGPUTextureFormat_RGBA8Unorm;
-  view_desc.dimension = WGPUTextureViewDimension_2D;
-  view_desc.mipLevelCount = 1;
-  view_desc.arrayLayerCount = 1;
-  WGPUTextureView target_view = wgpuTextureCreateView(target, &view_desc);
+  WGPUTextureView target_view =
+      gpu_create_texture_view_2d(target, WGPUTextureFormat_RGBA8Unorm);
 
   // Dynamic bind group
   const int max_entries = 2 + num_inputs + (num_inputs > 0 ? 1 : 0);
@@ -665,12 +637,8 @@ void TextureManager::create_gpu_composite_texture(
                     input_views, sampler);
 
   // Create view
-  WGPUTextureViewDescriptor view_desc = {};
-  view_desc.format = WGPUTextureFormat_RGBA8Unorm;
-  view_desc.dimension = WGPUTextureViewDimension_2D;
-  view_desc.mipLevelCount = 1;
-  view_desc.arrayLayerCount = 1;
-  WGPUTextureView view = wgpuTextureCreateView(texture, &view_desc);
+  WGPUTextureView view =
+      gpu_create_texture_view_2d(texture, WGPUTextureFormat_RGBA8Unorm);
 
   // Store
   GpuTexture gpu_tex;
diff --git a/src/tests/3d/test_3d_physics.cc b/src/tests/3d/test_3d_physics.cc
index 2ee5a4a..736cfc0 100644
--- a/src/tests/3d/test_3d_physics.cc
+++ b/src/tests/3d/test_3d_physics.cc
@@ -185,15 +185,8 @@ int main(int argc, char** argv) {
     wgpuSurfaceGetCurrentTexture(g_surface, &surface_tex);
     if (surface_tex.status ==
         WGPUSurfaceGetCurrentTextureStatus_SuccessOptimal) {
-      const WGPUTextureViewDescriptor view_desc = {
-          .format = g_format,
-          .dimension = WGPUTextureViewDimension_2D,
-          .mipLevelCount = 1,
-          .arrayLayerCount = 1,
-      };
-
       const WGPUTextureView view =
-          wgpuTextureCreateView(surface_tex.texture, &view_desc);
+          gpu_create_texture_view_2d(surface_tex.texture, g_format);
       g_renderer.render(g_scene, g_camera, time, view);
       wgpuTextureViewRelease(view);
       wgpuSurfacePresent(g_surface);
diff --git a/src/tests/3d/test_3d_render.cc b/src/tests/3d/test_3d_render.cc
index 49a265f..06e95c4 100644
--- a/src/tests/3d/test_3d_render.cc
+++ b/src/tests/3d/test_3d_render.cc
@@ -215,15 +215,8 @@ int main(int argc, char** argv) {
     wgpuSurfaceGetCurrentTexture(g_surface, &surface_tex);
     if (surface_tex.status ==
         WGPUSurfaceGetCurrentTextureStatus_SuccessOptimal) {
-      const WGPUTextureViewDescriptor view_desc = {
-          .format = g_format,
-          .dimension = WGPUTextureViewDimension_2D,
-          .mipLevelCount = 1,
-          .arrayLayerCount = 1,
-      };
-
       const WGPUTextureView view =
-          wgpuTextureCreateView(surface_tex.texture, &view_desc);
+          gpu_create_texture_view_2d(surface_tex.texture, g_format);
       g_renderer.render(g_scene, g_camera, time, view);
       wgpuTextureViewRelease(view);
       wgpuSurfacePresent(g_surface);
diff --git a/src/tests/common/offscreen_render_target.cc b/src/tests/common/offscreen_render_target.cc
index 10775a1..d322a7c 100644
--- a/src/tests/common/offscreen_render_target.cc
+++ b/src/tests/common/offscreen_render_target.cc
@@ -3,6 +3,7 @@
 // Provides pixel readback for validation.
 
 #include "offscreen_render_target.h"
+#include "gpu/gpu.h"
 #include "gpu/texture_readback.h"
 #include <cassert>
 #include <cstdio>
@@ -27,15 +28,7 @@ OffscreenRenderTarget::OffscreenRenderTarget(WGPUInstance instance,
   assert(texture_ && "Failed to create offscreen texture");
 
   // Create texture view
-  const WGPUTextureViewDescriptor view_desc = {
-      .format = format,
-      .dimension = WGPUTextureViewDimension_2D,
-      .baseMipLevel = 0,
-      .mipLevelCount = 1,
-      .baseArrayLayer = 0,
-      .arrayLayerCount = 1,
-  };
-  view_ = wgpuTextureCreateView(texture_, &view_desc);
+  view_ = gpu_create_texture_view_2d(texture_, format);
   assert(view_ && "Failed to create offscreen texture view");
 }
 
diff --git a/src/tests/gpu/test_post_process_helper.cc b/src/tests/gpu/test_post_process_helper.cc
index 13fd856..08b9e49 100644
--- a/src/tests/gpu/test_post_process_helper.cc
+++ b/src/tests/gpu/test_post_process_helper.cc
@@ -38,15 +38,7 @@ static WGPUTexture create_post_process_texture(WGPUDevice device, int width,
 // Helper: Create texture view
 static WGPUTextureView create_texture_view(WGPUTexture texture,
                                            WGPUTextureFormat format) {
-  const WGPUTextureViewDescriptor view_desc = {
-      .format = format,
-      .dimension = WGPUTextureViewDimension_2D,
-      .baseMipLevel = 0,
-      .mipLevelCount = 1,
-      .baseArrayLayer = 0,
-      .arrayLayerCount = 1,
-  };
-  return wgpuTextureCreateView(texture, &view_desc);
+  return gpu_create_texture_view_2d(texture, format);
 }
 
 // Minimal valid post-process shader for testing
diff --git a/tools/cnn_test.cc b/tools/cnn_test.cc
index b4a4bdc..1d736d9 100644
--- a/tools/cnn_test.cc
+++ b/tools/cnn_test.cc
@@ -700,15 +700,8 @@ static bool process_cnn_v2(WGPUDevice device, WGPUQueue queue,
   wgpuQueueWriteBuffer(queue, weights_buffer, 0, weights_data + weights_offset, weights_only_size);
 
   // Create input view
-  const WGPUTextureViewDescriptor view_desc = {
-      .format = WGPUTextureFormat_BGRA8Unorm,
-      .dimension = WGPUTextureViewDimension_2D,
-      .baseMipLevel = 0,
-      .mipLevelCount = 1,
-      .baseArrayLayer = 0,
-      .arrayLayerCount = 1,
-  };
-  WGPUTextureView input_view = wgpuTextureCreateView(input_texture, &view_desc);
+  WGPUTextureView input_view =
+      gpu_create_texture_view_2d(input_texture, WGPUTextureFormat_BGRA8Unorm);
 
   // Create static features texture (RGBA32Uint)
   const WGPUTextureDescriptor static_desc = {
@@ -1269,15 +1262,8 @@ int main(int argc, char** argv) {
   printf("Using CNN v1 (render pipeline architecture)\n");
 
   // Create input texture view
-  const WGPUTextureViewDescriptor view_desc = {
-      .format = WGPUTextureFormat_BGRA8Unorm,
-      .dimension = WGPUTextureViewDimension_2D,
-      .baseMipLevel = 0,
-      .mipLevelCount = 1,
-      .baseArrayLayer = 0,
-      .arrayLayerCount = 1,
-  };
-  WGPUTextureView input_view = wgpuTextureCreateView(input_texture, &view_desc);
+  WGPUTextureView input_view =
+      gpu_create_texture_view_2d(input_texture, WGPUTextureFormat_BGRA8Unorm);
   WGPUTextureView original_view = input_view; // Keep reference to original
 
   // Create CNN pipelines (different formats for intermediate vs final)
@@ -1333,17 +1319,11 @@ int main(int argc, char** argv) {
   };
 
   // Create views for intermediate textures (RGBA16Float)
-  const WGPUTextureViewDescriptor intermediate_view_desc = {
-      .format = WGPUTextureFormat_RGBA16Float,
-      .dimension = WGPUTextureViewDimension_2D,
-      .baseMipLevel = 0,
-      .mipLevelCount = 1,
-      .baseArrayLayer = 0,
-      .arrayLayerCount = 1,
-  };
   WGPUTextureView intermediate_views[2] = {
-      wgpuTextureCreateView(intermediate_textures[0], &intermediate_view_desc),
-      wgpuTextureCreateView(intermediate_textures[1], &intermediate_view_desc),
+      gpu_create_texture_view_2d(intermediate_textures[0],
+                                 WGPUTextureFormat_RGBA16Float),
+      gpu_create_texture_view_2d(intermediate_textures[1],
+                                 WGPUTextureFormat_RGBA16Float),
   };
 
   // Get sampler